Nut-lock



(N o Model.) I W J. F. PLUMMBR -& H. P. CHAPMAN.

' I NUT LOOK. No. 292,507. Patented Jan. 29,- 1884.

.NITED STATES,

PAT NT. I

met...

NUT-LOCK."

SPECIFICATION forming part of Letters Patent No. 292,507, dated January 29, 1884,

Application filed December'lfl, 1883. (No model.) 1

To aZZ whom it may concern:

Be it known that we, JOHN F. PLUMMER and HENRY P. CHAPMAN, both of Essex, in

the county of Middlesex and State of Connecticut, have invented certain new and use-- panying drawings, and to the letters of refera the axis of the bolt.

once marked thereon.

Like letters in the figures indicate the same parts.

Figure l is a side view of our improved nut-1ock as used with fish-plates on railroads. Fig. 2 is a view on enlarged scale, in section, of our deviceon a plane at right angles to Fig. 3 isa side View of our device, showing rearward-proj ecting points on the washer instead of the feet shown in Figs. 1 and 2. Fig. 4 is a detail edge view of the nut. Fig. 5 is a plan View of the washer, showing the interior of same viewed from the front.

Our invention relates to the class of nutlocks in whfch an added part-as a washer or collar, that is placed between the nut and the body of the thing bearing the boltis used; and it consists, mainly, in providing the not with a tapered and corrugated body fitted within a washer bearing a frictional clamp, a spring with projections that engage in the corrugations in the nut-body and prevent the ready turning of the nut, and the washer having projections which prevent its turning.

I11 the accompanying drawings, the letter a denotes a bolt of usual construction; I), a washer of metal, that is hollowed out and open to the front, the, hole at the center of the back being slightly greater in diameter than the bolt on which it fits. The chamber a in this washer has lateral sockets c, in which are seated the springs d, that are supported by their .ends, and have projections-or corrugations on the sides and in the plane of the axis of the nut. These springs are preferably struck up in the form shown, and are arranged in the sockets so as to engage the diametrically-opposite sides of the nut 6; but it is evident that a spring-pawl of common form can be used in place of the side springs to furnish the required yielding pressure on the nut that prevents its shaking loose or turning unless a certain amount of force is purposely employed, and this device with this office we calla frictional clamp, '(Z. .The nut-body hasa tapered lower part, c, that is roughened, preferably by corrugations, as shown, for the more ready introduction of the nut into the chamber. in the washer and between the springs, that are forced apart by such insertion of thenut and grasp it with a degree of pressure depending on the strength of the springs. The washer is provided 'with the foot f, when intended for use on railroads, and the feet bear on the lower web of the rail, as shown in Fig. 1, thus preventing the rotation of the washer, which is a necessary point in our invention.

WVhen the nut-lock is to be used on soft material-as wood-or the like-the washer has the points f, that are the alternate and equiv alent form of the foot, having the same function in the working of the device.

To prevent the accidental separation of the parts .in handling and transporting, the tags 6 are provided on the upper edge of the rim of the washer in position to be turned down upon the flange e of the nut or against the side of the head, that is squared for the appli- 'cation of a wrench in the usual manner.

' Thewasher is preferably made of malleable iron; but any convenient or suitable material may be used. I

"The operation of the lock is as follows: The bolt being in place, the washer is slipped upon it, bearing the frictional clamp d, and the nut heldin place by the bent tags, and the whole 'is turned up together until the projection on IOO I), having feet f, and chamber 0, with sockets d, and the nut 0, with the tapered and roughc', bearing the frictional clamp d, and the nut enedbody part c, all substantially as described.

0, having the tapered and corrugated body 3 JOHN F. PLUMMER.

part 6, all substantially as described. HENRY P. CHAPMAN.

3. In combination, the chambered washer \Vitnesses:

b, with projections f f and tags e and bear- I JAMES PHELPS,

ing within the chamber the frictional clamp LYDIA A. PHELPS. 

